Preliminary Experience with a Gastrointestinal Endoscope Using a White Light-Emitting Diode

In the conventional video endoscope sys− tem, a large light source apparatus and light−guiding fibre bundle are essential [1]. The capsule endoscope is mainly use− ful for disease of the small intestine [2]. Recently, the light−emitting diode (LED) has been rapidly developed as a new com− pact, powerful light source [3]. We have developed an new experimental proto− type LED−illuminated gastrointestinal en− doscope.